D-ficient
When a gay man is so obsessed with looking straight that he forgets how to be gay. It's like a dog who only knows how to bark at cats.
'I got D-ficient and I forgot how to be gay at the bar.'
'He's got D-ficient and he's just barking at cats in the park.'
'I tried to be straight and now I'm just a dog who barks at cats.'